Street-sweeper.



PATENTED JUNE 2, 1908.

R. I. MADDEN. STREET SWBEPER.

APPLICATION FILED SEPT. 21, 1907.

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. ing under the broom.

pulley a is rovided with a sprocket wheel 2 UNITED STATES RICHARD I.MADDEN, OF ST. LOUIS, MISSOURI.

STREET-SWEEPER.

Specification of Letters Patent.

Patented June 2, 1908.

Application filed September 21, 1907. Serial No. 393,919.

To all whom it may concern:

Be it known that I, RICHARD I. MADDEN, citizen of the United States,residing at St. Louis, State of Missouri, have invented certain new anduseful Improvements in Street- Sweepers, of which the following is afull, clear, and exact description, reference being had to theaccompanymg drawings, forming a part hereof.

My invention has relation to improvements in street sweepers; and itconsists in the novel construction and arrangement of parts more fullyset forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a side elevation of the sweeper, and Fig. 2is a horizontal section on the line 2-2 of Fig. 1.

The object of my invention is to construct a street sweeper which willautomatically remove the dirt and convey the same to a box or receptaclemounted on the wagon frame to which the operating parts are secured, the

material thus deposited in the box being either removed by shoveling, ormechanic ally dumped into an accompanying cart as the case may be, themanner of its disposition from the box not being specially concernedwith the immediate invention forming the subject matter of the presentapplication. The advantages of the invention will be better a parentfrom a detailed description thereo which is as follows:

Referring to the drawings, B, represents the wagon-body, A, Arespectively the axles of the front and rear trucks. Mounted loosely on,and adapted to oscillate in a ver tical plane about the axis of the rearaxle A, is a frame F of any suitable design, the same having mountedthereon at the base of the forward end thereof the cylindrical broom 1,the axis of the broom being inclined to the general length of themachine, and so positioned that it may sweep close to the curb of astreet and direct the sweepings inwardly. The frame F is provided withidler pulleys a, a a over which passes a belt-conveyer b, a section ofthe front end of the lower la ass- The shaft of t 1e rear from whicheads a sprocket chain 3 to a similar sprocket wheel 4 secured to theaxle A, a second sprocket wheel 5 on the said axle having a chain 6leading to a sprocket wheel 7 on the spindle of a bevel gear wheel 8meshing with a gear 9 on the broom-shaft. Secured also in properposition on the axle A is 11 to the sprocket wheel 12 on the end of ashaft 13 at the bottom of a vertically disposed chute 14. At the end ofthe upper curved extension of the chute is a second shaft 15, andbetween the shafts 18 and 15 within the chute is disposed a bucketconveyer 16. Secured to the rear of the frame F and engaging the uppersurface of the rear portion of the lower lap of the belt conveyer b arescrapers 17, 17 which direct the dirt from the belt into the bottomreceptacle 14 of-the chute, from which receptacle the buckets of theconveyer 16 carry the dirt upward where it drops through the dischargeopening 0, into the box or wagon-body B. So that the dirt may get by thepulley. a, the latter is made spool-shaped or with a longitudinallyconcave periphery, the dirt passing between the belt and said periphery(Fig. 2).

Pivoted to a bracket 18 is a bell-crank 19 one arm having coupledthereto one end of a link 20 whose opposite end is controlled by a lever21. The slotted end of the opposite arm of the bell-crank is coupled tothe oscillating frame F, and, as seen by the dotted position of theparts Fig. 1 the broom and belt-conveyer may be picked off the groundwhen desirable.

It will be seen from the foregoing that as the machine is drawn over theground, the wheels ofthe rear axle impart motion thereto, and this is inturn communicated to the broom and belt and bucket conveyers, the dirtdropping into the wagon-body.

Features illustrated but not described are Well known and therefore arenot herein specifically referred to.

Having described my invention, what I claim is:

1. In a street sweeper, a wagon body, a broom automatically rotatedagainst the surface passed over by the travel of the wagon, an endlessconveyer positioned to receive the sweepings from the broom, a chute, ascraper for directing the sweepings from the conveyer into said chute,and means for delivering the material from the chute into the body,substantially asset forth.

a sprocket wheel 10 from which leads a chain 2. In a street sweeper, awagon body, a I

by the broom, means for disengaging the conveyer from the surface passedover, a chute, a scraper for directing the sweepings from the conveyerinto said chute, and means for delivering the material from the chuteinto the wagon-body, substantially as set forth.

3. In a street sweeper, a wagon-body, a broom automatically rotatedagainst the surface passed over by the travel of the wagon, averticallyoscillating frame coupled tothe rear truck of the wagon, an endless beltconveyer mounted on said frame and having a section of its lower lappassing under the broom, the latter being mounted on the oscillatingframe, suitable gearing for actuating said broom and be'lt-conveyerfromthe axle of the rear truck, a scraper engaging the lower lap of thebelt-conveyer at a point beyond the broom, a chute for receiving thedirt removed by the scraper, a bucket conveyer in the chute fordirecting the material into the wagon-body, a series of idlers orpulleys for the belt-conveyor, the pulley adjacent to the scraper beingspoolshape(l to allow the dirt to pass onward to the scraper,substantially as set forth.

In testimony whereof I affix my signature, in presence of two witnesses.

RICHARD I. MADDEN. Witnesses:

W. C. KILLEEN, H. T. MoEHLE.

